eohland



C. I.' ROHLAND.

FAS'TENING. APPLICATION FILED OCT. I4. I9I8f Patented June l0, 1919.

CURT J'. ROHLAND, OF' PROVIDENCE, RHODE ISLAND;

ASSIGNOR TO NATIONAL RING TRAVELER CO., OF PROVIDENCE, RHODE ISLAND, A. CORPORATION OF RHODE ISLAND.

FAsTENINe.

Specification of Letters Patent. Patented Jun 10 19197,

Application filed October 14, 1918. Serial No. 257,943.

To all LU/wm z't may concern.'

Be it known that I, CURT4 J. ROHLAND, a deelarant citizen of the United States, heretofore a subject of William II, Emperor of Germany, residing at Providence, Providence, State of Rhode Island, have invented certain new and useful Improvements in Fastenings, of which the'following is a specification.

This invention relates to fastenings or the like provided witha head of material diHervent from the shank as for example, a head of papier mch, lleather or fiber.

My invention in its most usual embodiment is in the form of an upholstery nail or .tack and will be mze particularly discussed in that form although obviously capable of' application to other articles of manufacture.v The great difficulty heretofore in the manufacture of articles of this sort has been to effect an attachment of the head to the shank with sufficient permanence to vavoidy its disruption'in driving or in drawing/ In such forms of these articles as are pro;` vided with head of fiber it has beenexceedingly'diflicult on account of the nature of the hea( to secure anythin like a substantial permanence because of ti'ie common tendency of the head-to pull 'away from the metal l shank. Various forms of expanding or" elenching connectors have been used but have been so far as I ain advised, of necessity, m'ade so that they would bend easily in clenching and therefore equally liable to bend and give away under strain. v

The object of my invention is to provide such an article headed in such a manner as to secure a maximum strength of attachment and yet capable4 of being produced rapidly and economically.

This I accom lish l'iy'rotati rely embedding ina disk of mill board, the head of the nail which has been given a general spiral form so that it be entered readily and lodged with great security. The practice of my invention will be more fully set forth in the specification which -follows in which I shall descrihea form Well adapted to practical use and convenient manufacture.

The form shown in the drawings vis characteristic of my invention although only one of many. Throughout drawings and Aspecifications like reference characters are em-V county of y ployed to indicate corresponding parts. In the drawings: H

Figure 1l is a view with attached head in Fig. 2 an elevation the nail member. Fig. 3 face and edge views 4of the head blank. f

of the headed eind of of an upholstery nail section. of the headed end of Fig. 4 a plan view the nail member.

and

Fig. 6 a sectional view of the head attached-but before finishing. f

In practising my invention I 'produce headed fastening members of an desired type as for example the nail shown in the drawings. Each such fastening consists of a shank 1 headed at 2. The head is preferably rather thin and is radially opened up rather sharp edges which are oppositely sprung. This forms of the disk a warped surface of the general class of fiat spirals, the disk like head however pitching oppositely about the line of the shank 1.

The head 4 is prepared in blank from 4 being a simple disk cut from suitable mill board stock which preferably has somewhat of transverse strata as suggested in the section shown in Fig. 6.

Fig. 5 an elevation of the'nished article ywith a sector shaped cut as at 3. The out 1s made on somewhat of a bevel to give two In practicev the prepared t'asteningsl are fed to a rotatablechuck in which they are grasped and' rotated against the centerof the face of a blank 4f. fed it therefore receives a shank head which is rotatively lodged Within it. In this As each blank islodgment the upper edge of the slit 3, being warped bites into the face of the blank on a radial line and works successively through the strata untilit is completely embedded' in theeenter of the blank.

vThe rough head is finished by compression into the sha es required and this Aco'mpression of the lead condenses the 'structurc of mill board to a homogeneous mass with the warped head definitely set in its center.

Nails headed in this manner show a remarkable degree of perinanmuiyl as to their heads and may be driven and drawn without dislodgmg or disrupting the head.

comparatively l The fastenings may be of various types head embedded in said attached head, the

and the heads may be variously produced edges of the slit lyin in diiferentplanes. and fashioned: The manner of assembly 6. The method of ma ling aheaded fastenmay also be varied and the practice of the ing consisting in slitting the head, in opp invention tmodified all without departing positely warping the edges of said slit and from the spirit of my invention if Within in embedding the slit head in a covering the limits -of the appended claims. head by a rotative progression.

What I therefore claim and desire to se- ,7. The method of making a headed fastencure by Letters Patent is: ing, consisting in slitting said head, in

10 l. A fastening'of the class described comwarping one edge of the slit from the plane prising ahead and a shank havin a headed of the other edge, in embedding the head end comprising a fiat spiral em edded in in a covering head by a rotative progressaid head. sion, and in subsequently compressing said 2. A fastening of the class described comcovering head thereon..

15 prising a head and a shank having a headed 8. The method of making a headed lfastenend comprising a single turn fiat spiral eming, consisting in radially slitting thehead, bedded in said head. in spreading the slit transversely of the 3. A fastening of the class described, complane of the head, in embedding said split 20 aving a head provided with a radial slit by a rotative progression through the lamiand embedded in said head. nations, and in subsequently compressing 4. A fastening of the class described, comsaid covering head thereon. prising a transversely laminated liber head, In testimony whereof I aiiix my signature a shank having a relatively thin head proin presence of two Witnesses. 25 vided with a radial slit and embedded in CURT J. ROHLAND.

the laminations of said compressible head. Witnesses:

5. A fastening comprising an attached 'WILLIAM R. CHAMPLIN,

head, and a shank having a flattened slitted MARGUERITE A. GILGHRIST.

prising a compressible head, and a shank head in a laminated fibrous covering headv 

